Instant Interrupts - Revisited

[nacho7577]

Thanx for your answer.

I understand you about the understanding the code.... me too sometimes....

OK lcdout cadena\20

>And the reason you're missing characters, is probably because the data is >received by the interrupt handler, but it's being put into the "buffer" array in >the main loop. That should be done in the handler too.
¿? Something like this?:

'---[RX - inmterrupt handler]----------------------------------------------
Int_RX:
PORTA.1 = 1 'to check RX int has come
hserin [char]
cadena[i] )= char
i = i +1
@ INT_RETURN

but lcd displays rare....

Don´t worry i´ll figth with it.

Thanx for all.

[Darrel Taylor]

Better, but it still needs a way to limit it to the "bounds" of the array. Or, it will overwrite all your other variables. Maybe like this.

'---[RX - inmterrupt handler]----------------------------------------------
Int_RX:
    PORTA.1 = 1 'to check RX int has come 
    hserin [cadena(i)] 
    i = i +1
    if i >= 20 then i = 0
@ INT_RETURN

Of course this still has the problems of not knowing how many bytes were received, if the buffer overflows, if USART errored etc.

You might want to take a look at this program from Joe S.

LCD serial backpacks
http://www.picbasic.co.uk/forum/showthread.php?p=28336

It has a complete "Circular Buffer" using DT_INTS.
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